An important feature of tablets is battery life, the number of hours before the battery needs to be recharged. The data shown in the table below contain the battery life of 10 WiFi-only and 10 3G/4G/WiFi 9- through 12-inch tablets. Complete parts (a) through (C).
|44 29 34 36 44 42 20 31 56 52||61 52 52 59 56 23 40 33 45 60|
a. Assuming that the population variances from both types of tablets are equal, is there evidence of a difference in the mean battery life between the two types of tablets? Use a=0.01.
Let u, be the mean battery life for WiFi-only tablets and be the mean battery life for 3G/4G/WiFi tablets.